> JKC has noted that evolution has put a tremendous amount of effort into> detecting and concealing lies, so a perfect truth machine is unlikely.>> I say exactly the opposite: Evolution has put so much effort into lies> that there's probably a module of the brain devoted to lying (anyone> know if someone's looked for it?), and thus it might be very easy to> detect activity with an fMRI. Evolution baffles verbal and kinesic> perceptions, but would have absolutely no reason to defend against> neuroimaging. The inventor might not even need much cognitive science;> a neural net might be very easily trainable to decode "lying" brain activity.